Pentium II 266, 96MB, Windows98 SE, POV3.5b2
Problem in pigment_pattern with bozo/f_noise3d:


When using bozo as the pattern type in a pigment_pattern
the results are 'extremely' plateaued. So far, random tests with
other pattern types produce the expected behaviour however.

The following code demonstrates the behaviour as both a pattern
type in a texture block with accompanying texture map, and as a
function used in a pigment block. It also attempts to use the
function version as a means of varying the diffusion across the surface
of an object, and doesn't work as one might expect; another issue I'll
save for my next post.

//Start Code:
#version 3.5;

#include "colors.inc"
#include "functions.inc"

global_settings {
  assumed_gamma 1.0
  noise_generator 3
}

// ----------------------------------------
 background {color MediumBlue}

camera {
  location  <0.0, 0.5, -4.0>
  direction 1.5*z
  right     x*image_width/image_height
  look_at   <0.0, 0.0,  0.0>
}


light_source {
  <0, 0, 0>
  color rgb <1, 1, 1>
  translate <-30, 30, -30>
}

// ----------------------------------------



#declare Fn_AmbMap = function{ pigment{
       pigment_pattern {bozo scale 0.5}
                   color_map {
        [0.00 color rgb <0,0,0> ]
        [1.00 color rgb <1,1,1> ]
      }
   }
}//end function

#declare Fn_Green = function{pigment { color Green }}

#declare txDiffHi=  texture{
          pigment {function{Fn_Green(x,y,z).gray} }
         finish {diffuse 1}
  }

#declare txDiffLo=  texture{
          pigment {function{Fn_Green(x,y,z).gray} }
         finish {diffuse 0}
}

//Sphere 1  :Left
sphere {  0.0, 1
  texture{ pigment {function{Fn_AmbMap(x,y,z).gray}scale 0.5 }
         finish {diffuse pow((Fn_AmbMap(x.x,y.y,z.z).gray),1)}
  }
  rotate y*45
  translate <-2.25,0,4>
}

//Sphere 2 : Right
sphere {  0.0, 1
  texture{ pigment {function{Fn_Green(x,y,z).gray} }
         finish {diffuse pow((Fn_AmbMap(x.x,y.y,z.z).red),1)}
  }
  rotate y*45
  translate <2.25,0,4>
}

//Sphere 3 : Bottom
sphere {  0.0, 1
  texture{ pigment_pattern { bozo scale 0.5 }
              texture_map {
                  [0 txDiffLo ]
                  [1 txDiffHi ]
              }
          }
  rotate y*45
  translate <0,-2,4>
}


--
Batronyx ^"^
bat### [at] cadronhsacom
http://www.batronyx.com

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